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celestial guidance

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noun
  1. a guidance system for an aeronautical or space vehicle by which an automatic device in the vehicle takes periodic fixes on celestial bodies to determine the vehicle's position and to guide it along a particular flight path.
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Compare celestial navigation, command guidance, inertial guidance.
Also called astro-inertial guidance.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for celestial guidance

celestial guidance

noun
  1. the guidance of a spacecraft or missile by reference to the position of one or more celestial bodies
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012